The best way to address mold stains is to use a product that is specifically designed for removing mold and mildew stains on marble such as this one.
Clean water stain on marble.
Cleaning marble to remove water spots and hard water stains.
You have a lot invested in your marble surfaces so a guaranteed safe commercial product is worth the small extra expense.
For most organic food stains the marble institute recommends cleaning with a solution of 12 hydrogen peroxide and a few drops of ammonia.
Wipe down your marble with a clean dry rag when you notice water standing on the marble surface.
Simple water stains and hard water stains.
There are two primary types of water stains.
You can either use regular marble cleaner or try removing the stain using grade 0000 steel wool.
Different types of stains require distinct cleaning solutions.
Marble tables are highly susceptible to water rings and water marks.
If you spilled anything oil based like a vinaigrette.
These surfaces commonly collect water that splashes onto the marble surface and when you allow the water to air dry you typically get left with cloudy dirty looking spots of residue.
Since marble is softer than other natural stones such as granite it is more susceptible to staining from cooking and spills.
Hot water works best.
Water stains are a common issue with marble countertops but pure water will not stain or damage marble.
For most small clean up jobs though you can use plain water and a sponge or soft cloth.
When the water evaporates it leaves behind calcium and magnesium which form an unsightly stain on your marble.
Cleaning your marble surface with a cleaner meant for etch marks rust stains or mildew has little effect on removing water spots.
Just apply the marble cleaner to the spot and rub with a clean towel.
Use a marble cleaner and clean towel.
On the other hand hard water stains are the result of hard water getting into the pores of the stone.
Simple water stains are often the result of condensation from a drinking glass that has been sitting on the countertop for too long.
Water spots and hard water stains can usually be removed with a marble cleaner and a soft towel.
Marble is vulnerable to acids alkalis and abrasive cleaners.
Water stains can be easily removed from marble.
When a glass is set down on a marble table condensation can drip down the outside of the glass and create a pool of water.
Etching is the cause of these seemingly transparent or chalky dull spots as seen in the photo at the top of the page.